# Opacity adjustment and export of multi-page pdfs not possible? **URL:** \ **Category:** General usage\ **Created:** [April 23, 2024, 10:13am UTC](https://scilab.discourse.group/t/opacity-adjustment-and-export-of-multi-page-pdfs-not-possible/480 "2024-04-23T10:13:05Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![yann](https://avatars.discourse-cdn.com/v4/letter/y/bc79bd/32.png) [@yann](https://scilab.discourse.group/u/yann)\ **Post date:** [April 23, 2024, 10:13am UTC](https://scilab.discourse.group/t/opacity-adjustment-and-export-of-multi-page-pdfs-not-possible/480/1 "2024-04-23T10:13:05Z")
(using 6.1.1 on Windows 10) Hello, I looked into the issues of adjusting opacity in 2D plots and exporting multiple figures to one multi-page PDF-file quite extensively and at this point I am pretty sure, these features are simply not implemented in Scilab. Is my Assumption right or did I miss some functionalities? Thanks for your comments, Yann ---
**Author:** ![mottelet](https://yyz2.discourse-cdn.com/free1/user_avatar/scilab.discourse.group/mottelet/32/13_2.png) [@mottelet](https://scilab.discourse.group/u/mottelet)\ **Post date:** [April 23, 2024, 12:01pm UTC](https://scilab.discourse.group/t/opacity-adjustment-and-export-of-multi-page-pdfs-not-possible/480/2 "2024-04-23T12:01:44Z")
Hello, Scilab does not handle TrueColor model (only RGB indexed colors) in general. The only entity handling RGBA is the Matplot entity (see [Matplot - 2D plot of a matrix using colors](https://help.scilab.org/Matplot)). Multipage pdf are not supported. S. ---
**Author:** ![philipp](https://yyz2.discourse-cdn.com/free1/user_avatar/scilab.discourse.group/philipp/32/53_2.png) [@philipp](https://scilab.discourse.group/u/philipp)\ **Post date:** [May 3, 2024, 9:59pm UTC](https://scilab.discourse.group/t/opacity-adjustment-and-export-of-multi-page-pdfs-not-possible/480/3 "2024-05-03T21:59:02Z")
Although the request is about 2D plots, you probably may find following link useful. > [@Opacity and scicv](https://scilab.discourse.group/t/opacity-and-scicv/495): > > Dear, opacity in graphs (and images) seem to pop up as a request once in a while. A recent question (as of 05.2024) , see: Well, an older discussion pointed out to use scicv, but no final statement about opacity was done back then. [https://lists.scilab.org/pipermail/users/2019-March/014858.html](https://lists.scilab.org/pipermail/users/2019-March/014858.html) The recent request made me think again, and I put together some code. If I am not to wrong, scicv do can handle opacity, but it is a bit tricky and not well documented. I used scicv 0.6.2. Analyz… Philipp ---
**Author:** ![yann](https://avatars.discourse-cdn.com/v4/letter/y/bc79bd/32.png) [@yann](https://scilab.discourse.group/u/yann)\ **Post date:** [May 21, 2024, 3:02pm UTC](https://scilab.discourse.group/t/opacity-adjustment-and-export-of-multi-page-pdfs-not-possible/480/4 "2024-05-21T15:02:18Z")
Thank you for your answer @mottelet I have a follow-up question on this topic. Is it possible to commission someone to programme the said functionalities for a fee? Yann ---
**Author:** ![mottelet](https://yyz2.discourse-cdn.com/free1/user_avatar/scilab.discourse.group/mottelet/32/13_2.png) [@mottelet](https://scilab.discourse.group/u/mottelet)\ **Post date:** [May 21, 2024, 3:29pm UTC](https://scilab.discourse.group/t/opacity-adjustment-and-export-of-multi-page-pdfs-not-possible/480/5 "2024-05-21T15:29:29Z")
@yann: I am sorry but adding opacity in the general Scilab graphic model is a HUGE work beause it would necessitate to revamp the whole renderer module and it cannot be something else than a long term milestone. However, if you can afford to hire a Java/C++/OpenGL specialist we would be glad to help him to dive into Scilab project! S. ---
**Author:** ![yann](https://avatars.discourse-cdn.com/v4/letter/y/bc79bd/32.png) [@yann](https://scilab.discourse.group/u/yann)\ **Post date:** [May 28, 2024, 3:30pm UTC](https://scilab.discourse.group/t/opacity-adjustment-and-export-of-multi-page-pdfs-not-possible/480/6 "2024-05-28T15:30:34Z")
@mottelet: That really does sound like a big project to tackle and unfortunately probably out ouf scale for us as well then. Would adding multipage PDF support mean a similar amount of work or could that be done on a smaller scale? Yann ---
**Author:** ![mottelet](https://yyz2.discourse-cdn.com/free1/user_avatar/scilab.discourse.group/mottelet/32/13_2.png) [@mottelet](https://scilab.discourse.group/u/mottelet)\ **Post date:** [May 28, 2024, 4:11pm UTC](https://scilab.discourse.group/t/opacity-adjustment-and-export-of-multi-page-pdfs-not-possible/480/7 "2024-05-28T16:11:55Z")
> [@yann](#): > > Would adding multipage PDF support mean a similar amount of work or could that be done on a smaller scale? I think so. Stay tuned. S. ---
**Author:** ![mottelet](https://yyz2.discourse-cdn.com/free1/user_avatar/scilab.discourse.group/mottelet/32/13_2.png) [@mottelet](https://scilab.discourse.group/u/mottelet)\ **Post date:** [May 30, 2024, 9:09am UTC](https://scilab.discourse.group/t/opacity-adjustment-and-export-of-multi-page-pdfs-not-possible/480/8 "2024-05-30T09:09:05Z")
Hi, see [https://scilab.discourse.group/t/new-multipage-pdf-toolbox](https://scilab.discourse.group/t/new-multipage-pdf-toolbox) S. ---
**Author:** ![yann](https://avatars.discourse-cdn.com/v4/letter/y/bc79bd/32.png) [@yann](https://scilab.discourse.group/u/yann)\ **Post date:** [June 3, 2024, 3:22pm UTC](https://scilab.discourse.group/t/opacity-adjustment-and-export-of-multi-page-pdfs-not-possible/480/9 "2024-06-03T15:22:41Z")
@mottelet Thank you very much! Yann ---
**Author:** ![mottelet](https://yyz2.discourse-cdn.com/free1/user_avatar/scilab.discourse.group/mottelet/32/13_2.png) [@mottelet](https://scilab.discourse.group/u/mottelet)\ **Post date:** [June 3, 2024, 4:13pm UTC](https://scilab.discourse.group/t/opacity-adjustment-and-export-of-multi-page-pdfs-not-possible/480/10 "2024-06-03T16:13:43Z")
OK, keep me informed about the fitness of the toolbox to your usecases. S.